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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/wm/workspace/phantom_window_controller.h"
#include "ash/shell.h"
#include "ash/shell_window_ids.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/base/animation/slide_animation.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/skia_util.h"
#include "ui/views/painter.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace internal {
namespace {
// Amount to inset from the bounds for EdgePainter.
const int kInsetSize = 4;
// Size of the round rect used by EdgePainter.
const int kRoundRectSize = 4;
// Paints the background of the phantom window.
class EdgePainter : public views::Painter {
public:
EdgePainter() {}
// views::Painter overrides:
virtual void Paint(gfx::Canvas* canvas, const gfx::Size& size) OVERRIDE {
int x = kInsetSize;
int y = kInsetSize;
int w = size.width() - kInsetSize * 2;
int h = size.height() - kInsetSize * 2;
bool inset = (w > 0 && h > 0);
if (w < 0 || h < 0) {
x = 0;
y = 0;
w = size.width();
h = size.height();
}
SkPaint paint;
paint.setColor(SkColorSetARGB(100, 0, 0, 0));
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
canvas->sk_canvas()->drawRoundRect(
gfx::RectToSkRect(gfx::Rect(x, y, w, h)),
SkIntToScalar(kRoundRectSize), SkIntToScalar(kRoundRectSize), paint);
if (!inset)
return;
paint.setColor(SkColorSetARGB(200, 255, 255, 255));
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(2));
canvas->sk_canvas()->drawRoundRect(
gfx::RectToSkRect(gfx::Rect(x, y, w, h)), SkIntToScalar(kRoundRectSize),
SkIntToScalar(kRoundRectSize), paint);
}
private:
DISALLOW_COPY_AND_ASSIGN(EdgePainter);
};
} // namespace
PhantomWindowController::PhantomWindowController(aura::Window* window)
: window_(window) {
}
PhantomWindowController::~PhantomWindowController() {
Hide();
}
void PhantomWindowController::Show(const gfx::Rect& bounds) {
if (bounds == bounds_)
return;
bounds_ = bounds;
if (!phantom_widget_.get()) {
// Show the phantom at the bounds of the window. We'll animate to the target
// bounds.
start_bounds_ = window_->bounds();
CreatePhantomWidget(start_bounds_);
} else {
start_bounds_ = phantom_widget_->GetWindowScreenBounds();
}
animation_.reset(new ui::SlideAnimation(this));
animation_->Show();
}
void PhantomWindowController::SetBounds(const gfx::Rect& bounds) {
DCHECK(IsShowing());
animation_.reset();
bounds_ = bounds;
phantom_widget_->SetBounds(bounds_);
}
void PhantomWindowController::Hide() {
phantom_widget_.reset();
}
bool PhantomWindowController::IsShowing() const {
return phantom_widget_.get() != NULL;
}
void PhantomWindowController::AnimationProgressed(
const ui::Animation* animation) {
phantom_widget_->SetBounds(
animation->CurrentValueBetween(start_bounds_, bounds_));
}
void PhantomWindowController::CreatePhantomWidget(const gfx::Rect& bounds) {
DCHECK(!phantom_widget_.get());
phantom_widget_.reset(new views::Widget);
views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
params.transparent = true;
params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
// PhantomWindowController is used by FrameMaximizeButton to highlight the
// launcher button. Put the phantom in the same window as the launcher so that
// the phantom is visible.
params.parent = Shell::GetContainer(
Shell::GetActiveRootWindow(),
kShellWindowId_LauncherContainer);
params.can_activate = false;
params.keep_on_top = true;
phantom_widget_->set_focus_on_creation(false);
phantom_widget_->Init(params);
phantom_widget_->SetVisibilityChangedAnimationsEnabled(false);
phantom_widget_->GetNativeWindow()->SetName("PhantomWindow");
views::View* content_view = new views::View;
content_view->set_background(
views::Background::CreateBackgroundPainter(true, new EdgePainter));
phantom_widget_->SetContentsView(content_view);
phantom_widget_->SetBounds(bounds);
phantom_widget_->StackAbove(window_);
phantom_widget_->Show();
// Fade the window in.
ui::Layer* layer = phantom_widget_->GetNativeWindow()->layer();
layer->SetOpacity(0);
ui::ScopedLayerAnimationSettings scoped_setter(layer->GetAnimator());
layer->SetOpacity(1);
}
} // namespace internal
} // namespace ash
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